import wx

app = wx.PySimpleApp()

dlg = wx.SingleChoiceDialog(None,
        'What version of Python are you using?',
        'Single Choice',
        ['1.5.2', '2.0', '2.1.3', '2.2', '2.3.1'],)
if dlg.ShowModal() == wx.ID_OK:
    response = dlg.GetStringSelection()
    print response
